Calculating Paint Quantities

Not ordering enough paint for your decorating project can be very frustrating, but over ordering will mean you're left with items you don't need. You can minimize the chances of this happening by using our convenient paint calculator. While our advice is for guidance only, we would strongly recommend that you always check with your decorator before ordering contact us directly for further advice or assistance. Please note that we do not take doors, windows and alcoves into consideration when making our calculations.

Please also take into account the nature of the surface which you are painting beforehand. Porous walls are likely to require extra coats and vast colour transformations (i.e. white to black or black to white) are also likely to require a third coat. You can minimize the chance of this by using the correct undercoat.

How to calculate the right amount of paint

Calculate the right amount of paint with these handy tips.
  1. First, assess the size of the area that you’re painting. Measure the width and height of walls with a metal tape measure and multiply these together to calculate the overall square metre measurement.

  2. Multiply your total square metre measurement by the number of coats you’ll need – we recommend factoring in at least two coats. It's also worth including a little extra paint for touch ups.

  3. Finally, divide this total figure by the m²/l number of your preferred paint (if you can’t see it on the tin, have a look at the product information section). This will give you the total litres of paint you need for your project.

  4. Don’t forget, the type of paint will make a difference and so will the manufacturer. When you use higher quality paint like Farrow and Ball, you’ll notice that you use less paint to get a great result.

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